Question
State Henry’s law and write its two applications.
✓
Answer
Henry’s law states that “the partial pressure of the gas in vapour phase $(p)$ is proportional to the mole fraction of the gas $(x)$ in the solution”:
- To increase the solubility of $CO_2$ in soft drinks.
- At high altitudes the partial pressure of oxygen is less than that at the ground level. This leads to low concentrations of oxygen in the blood and tissues of people living at high altitudes or climbers.
- Scuba divers must cope with high concentrations of dissolved gases while breathing air at high pressure underwater. Increased pressure increases the solubility of atmospheric gases in blood.
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